Gear-cutting engine.



" No. 7oo,|s4. Patented May 20', I902.

r. L. :azmmnm & H. r. EMME.

GEAR CUTTING ENGINE.

(Application filed. May 8, 1901.) (No Model.)v 3 Sheets8heat I.

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uu-mfrmo.v WASHINGTON n No. 700,134.. Patented May 20, I902. F.. L. EBEBHARDT & H. F. EMME.

GEAR CUTTING ENGINE.

(Application flleld m 8, 1901.) (No Modgl.) v 3 Shady-Sheet 2.

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mznoams PETERS cuiw-lowumo WASHNGTON u c No. 700,184. Patented ma 20, I902.

' F.'L. EBEBHARDT &. H. F. EMME.

GEAR CUTTING ENGINE.

(Application filed May 8, 1901.)

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, (No Model.)

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UNITED STATES PATENT OFFIGE,

FRED L. EBERHARDT AND HENRY F. EMME, OF NEWARK, JERSEY,

ASSIGNORS TO GOULD & EBERHARDT, OF NEWARK, NEW JERSEY, A

CORPORATION'OF NEW JERSEY.

GEAR-CUTTING, ENGINE.

SPECIFICATION forming part of Letters Patent No. 700,184, dated May 20, 1902.

Application filed May 8, 1901.

Serial No. 59,194.. on model.)

To all whom it may concern.-

Be it known that we, FRED L. EBERHARDT, residing at 17 Hillside avenue, and HENRY F. EMME, residing at 896, South Seventeenth street, Newark, Essex county, New Jersey,

devices which reciprocate the cutter-head upon the cutter-slide.

The present improvements relate especially to that class of gear-cuttersin which vertical and horizontal inclinationsof the cutter-slide are required for cutting bevel gea'rs and wormf gears.

The primary object of the invention is to operate the machine by a single driying-shaft upon the machine itself and in permanent connection with the different trains of gearing, so that the various adjustments and move-"- 0 ments of the parts areefiected withoutvary ing the relation ofthe driving-shaft itself, To effect this result, the driving-shaft is mounted in a bearing ona linewith the joint of the hinge-plate, which adjusts the cutter: 3 5 slide at vertical angles, and thedrivingshaft thus maintains a uniform relation with the cutter-slidewhatever the position of the latter. In machines for cutting worm-wheels the cuttor-slide is pivoted uponthe hinge-plate, so 40 as tobe setat varioushorizontalangles, and

to connect the driving-shaft with such an adj ustable cutter-slide a universal joint is ine sorted in thetrain of ge'aringwhich connects the driving-shaft withthe'feed-gearing upon the cutter-slide. [Where the hinge plate is I supported upon an adjustable table, the bearing for the driving-shaft is attached to such table, sons to maintain a fixed relation with the pivot of "the joint of the hinge-plate whating-shaft with the cutter by a train of gear- -the stop mechanism which determines the arc .d ishinged'to the table at the rear end by lever-the adjustment of the table. Such an arrangement of the driving-shaft permits a single pulley to be used for driving the entiremachine and permits a single belt to 0pmm the' machine in all its various adjust ments without any variation in its tension. 5 Another object of the invention is to vary the speed at which. the blank or the cutter may be rotated without'modifying the speed or the driving-shaft. This is elfected in the easeof the cutter by connecting the driv- 6o ing in which change-wheels are inserted to change the speed of the cutter as required. In the case of the dividing mechanism which shifts the blank the driving-shaft is con 5 nected with the shifting-worm by a train of gearing iii-which change-wheels are also inv sorted to effect the object, and the Worm can be thus rotated more rapidly in cutting small pinion s, so as to save time in shifting the blankthrough a large arc. Such change- .j wlie els perform an entirelydifierent function from those connected with the worm and with of rotation. I The invention also includes an adj ustable brace for the outer end of the mandrel.

The invention will be understood by reference to the annexed drawings, in which-- Figure 1 is a side elevation of a gear-cutter provided with our improvements and the cutter-slide in a horizontal position to cut the cylindrical blank shown upon the mandrel. Fig.

'2 shows an elevation of the cutter-slide in an inclined position. Fig. 3 is a plan of the machine, and Fig. 4 is a rear elevation; Figs. 5 and 6 show a support for the mandrel 0. Y

The bed a is shown with column 1), upon .which the mandrel 0 is supported in bearing '0, and the blank q is rotatedby worm-wheel rfwhich is indicatedbydottedlines in Fig. 4E and is concealed' by acasingriin Fig. 1. A table 0 is adjustable upon the bed in the usual manner by means of the screw 12', which is shown onlyin Fig. 1, and the hinge-plate joint e. The hinge-plate is provided with segments f and the table with a shaft and ears f to elevate the hinge-plate as desired. The cutter-slide h is pivoted upon the hingeplate by stud 71 (see Fig. 3,) and the slide and the hinge-plate are connected by slots and bolts h to provide for horizontal angular adjustment of the slide. The driving-shaft e is mounted in a line with the joint 6 in a bearing g,attached to the table c,whicl1is-pr0- vided, as shown in Fig. 4, with a downwardlyprojecting flange for such purpose. A driving-pulley P is shown upon the shaft 6, and this pulley, which may be driven by a single belt, serves to operate all the mechanism of the entire machine. The segments fare attached to the hinge-plate concentric with the said joint and hearing, but are fixed to the hinge-plate at one side of such hearing, as shown in Fig. 2.

The cutter-head 11, carrying the cutter-spindle j, is mounted upon the cutter-slide and shown with feed-screw k extended into a gearcase k upon the forward end of the cutterslide. Such case is commonly used to contain the reversing-gearing to turn the screw in opposite directions to reciprocate the cutter-head; but such gearing forms no part of the present invention and may be made of any usual character. A gear k which is usually formed with a threaded hub, is shown upon the forward end of the screw, and a gear is shown below the box in Fig. 1, which would in practice be connected with the gear k by a reversing-clutch to be operated inthe usual manner.

A shaft Z is connected with the drivingshaft by bevel-wheels p and is extended to the gear-case 70', being supported in a bearing d upon the hinge-plate and a bearing 7L upon the gear-case and provided near its ends with universal joints Z, which preserve the connection of the driving-shaft with the gear it when the cutter-slide is adjusted horizontally. The shaft Z connects one of the universal joints with the other through a splined sleeve Z which slides upon the shaft as required in its various adjustments. The horizontal adjustment of the cutter-slide operates to bend the shaft Z, and thus necessitates the provision of the universal joints Z and of the splined sleeve Z to permit a slight longitudinal play of the shaft Z between the two universal joints.

The cutter 0' (shown in Fig. 3) is connected with the driving-shaft by change-wheels m and 'shaft m, which is extended from the gear-case 70', through the bevehwheels s,which drive the change-wheels m, the shaft being splined to slip through one of the bevel-wheels as the cutter-head reciprocatesupon the slid e; Gears nare shown behind the change-wheels to normally reduce the speed of' the'cutter,

and the change-wheels m are shown-of equal diameter, but may be removed and others of various proportions substituted to vary the speed of the cutter. The head of a screw b is shown in Fig. l'for moving the'table upon the bed to and from the column, as is usual, and all of the gearing heretofore described is moved with such table, and the relation of all the parts is thus preserved.

The coincidence of the driving-shaft 6 with the joint of the hinge-plate preserves the relation of the shaft Zwith the driving-shaft in all positions of the cutter-slide, as is clearly indicated in the inclined position of the slide shown in Fig. 2.

The train of gearing connecting the driving-shaft e with the dividing-worm 91. comprises a horizontal shaft t and upright shaft 25, which are connected by the change-wheels t and by the usual friction-driver i The bracket carrying the bearing g is provided also with bearings g and g and with bevelwheels at, through one of which the shaft 15 is fitted to slide with a spline to compensate for various adjustments of the table 0. The change-wheels i are shown in Figs. 3 and; of different diameters adapted to reduce the speed of the worm 01 below that of the driving-shaft; but the change-wheels may be removed and others substituted to drive the worm at the same speed or at a greater speed than the driving-shaft. The shaft t is also provided with a spline, as shown at t in Fig. 4, to slip through the bevel-wheels a which connect such shaft with the worm-shaft,to compensate forvarious adjustments of the mandrel-head 0 upon the column. shaft is shown with change-wheels n at its right-hand end in Fig. 4, which may be used to connect it with the usual stop mechanism for determining the are through which the gear-blank qis rotated. i (shown in Figs. 1 and 3) is the usual means of connecting the driving-shaft with the worm, so that the connection may slip when the change-wheels n are arrested by the stop mechanism, and the novel feature in this construction is the introduction of the changewheels t in'the train which connects the driving-shaft with the worm n and which determines the speed at which the worm may rotate relative to the driving-shaft when the change-wheels n are free or released in shifting the gear-blank. i

It is obvious that the trains of gearing which are shown to connect the driving-shaft c with the various mechanisms may be modified in constructionwithout departing from the essential features of the invention,which consist, first, in the supporting of the driving-shaft'in a line with the joint of the hingeplate to maintain its connection with the cutter and the feeding mechanism of the-cutterhead in their variously-adjusted positions. Where the table 0 is adjustable upon the bed, the bearing of the driving shaft necessarily varies in its distance from the dividing-worm n, and an essential feature of the invention in such case consists, secondly, in the'provision of=a sliding connection, like the splined shaft 1, between the driving-shaft The worm The friction-driver and the worm n. In a machine where the cutter-slide is elevated at an angle and provided with such driving mechanism it is desirable to furnish a connection between the cutter-slide and the mandrel which supports the blank, so as to hold the two firmly in a fixed relation during the cutting of such blank, as otherwise the cutter-slide would be supported only by the segments). To thus connect the slide and mandrel, I attach an auxiliary bearing a to the bearing which supports the mandrel 0 adj ustably upon the column 1), and extend an arm to from such auxiliary bearing and connect the same with the end of the cutter-slide by a pivot-link w. The link is pivoted upon an car a: at the outer end of the cutter-slide and is slotted to fit a' bolt w upon the end'of the arm u, and the bolt is tightened when the link andarm are properly adjusted. The link is thus adapted to assume any position and relation to thearm that'is required in practice and to firmly connect the cutter-slide with the arm, and thus with the mandrel, through the agency of the bracket 1). The arm u carries abracket v to support the outer end of the mandrel, and as the mandrels used in such machines vary-in length the bracket is made adjustable upon the arm, so as to be fitted to the clamp the arm a adjustably, and the arm outer end of the mandrel in the usual manner. The bearing u is shown with a cap to may thus be slid backwardly in the bearing within the column b, as isindicated in Fig. 6. The bearing a is adjustable vertically upon the column bwith the bearing 0 in the usual manner, and the parts are shown arranged in Fig. 5 to apply a cylindrical blank to the man-1 drel to cut spur-teeth uponithe same. In such case the cutter-slide his horizontal; but Fig. 6 shows the cutter-slide elevated thirty degrees by operating the segments f, and the ear or is thus brought quite close to the end of the arm u, Thelink w is shown inclined and the arm pushed backwardlyinthe bearing a. to bring the bolt w" ofthe arm in'the slot of th elink 10,, A short mandrel is shown.

in thebearing a, and a blank q,with beveled face, is shownupon the mandrel and adjusted to be cut by, the cutter, c.

The various connections andadjustments described herein greatly increase the efficiency of the machine, and all cooperate'to diminish the labor of ;,the attendant andto.

cut the gears more perfectly.

Having thussetforth the nature of the invention, what is claimed herein is- 1. A gear-cutter-having the horizontal bed a, the table-cf adjustable upon the bed, the

hinge-plate djointed 'upon the tableand the cutter-slide h pivoted upon such hinge-plate, the bearing 9 attacheclto such table'and sup porting the driving-shaft e" in linewith thejoint of the hinge-plate, a horizontal bearing 9 connected with the bearing g and a horizontal driving-shaft as the shaft t extended ing with the shaft 6', whereby the motion of thedriving-shaft can be imparted to the'cutter when the hinge-plate is adjusted at various angles upon the table, substantially as herein set forth. t

2. A gear-cutter having a table with a hingeplate jointed thereon and supportingacutterslide witha cutter-head and feed-gearing for reciprocating the same, a bearing attached to the table with a driving-shaft in line with the joint of the hinge-plate, and a train of gearing connecting the driving-shaft with the feed-gearing and with the cutter-spindle, as

and for the purpose set forth.

3. A gear cutter having gearing with change-wheels to control the shifting of the blank, a bed with table adjustable upon the bed, a hinge-plate jointed upon the table, with a cutter-slide supported upon such hingeplate and a cutter-head movable upon the slide carrying a cutter-spindle and cutter to joint of the hinge-plate, and separate trains of gearing connecting the driving-shaftrespectively with the cutter-spindle and with, the change-wheels to control the shifting of the blank. r

4:. A' gear cutter having gearing with change-wheels to control the shifting of the blank, a-bed with table adj ustable upon the bed, a hinge-plate jointed upon the table withcutter-slide supported upon such hinge-plate,

. and a cutterehead movable upon the slide carthrough such bearing and connected by gear- A cut the blank, a bearing fixed to the table and supporting a driving-shaft in line with; the,

IOO

rying a cutter-spindle and cutter to cut the blank, a screw with gearing to reciprocate the cutter-head, a bearing fixed to the table and supporting a driving-shaft in line with the joint'of the hinge-plate, and separate trains of gearing connecting the driving-shaft re-' spectively with vthe cutter-spindle, the feedscrewof the cutter-head, andthe changewheels to control the shifting of the blank,

5. A gear cutter having gearing awitli change wheels to control the intermittent shifting of the blank, a bed a with table 0 adj ustable upon' the bed, the cutter-slide h piv- 4 oted upon thetable and adjustable angularly, the cutter-head t' movable upon the slide'and carrying thecutter-spindle 7', the feed-screw.

70 with gearing at the outer end of thecutter- I slide tolreciprocate the cutter-head, the hearing d" attached ,to the table and supporting the shaft Z parallel with the side of the table,"

a train of gearing connecting such shaft with the change-wheels to control theintermittent shiftingiof the bla'nk,and a'separate train of gearing connecting the shaft with the feed? screwk, and provided with the universal joints 1 tocompensatetfor the angular adjust-1 ment 'of the cutter-slide, substantially as set forth, 1 f

6."A gear- I change-wheels to control the l'shiftingof'th'e blank, the table 0 adjustable upon the'be'd b,

cutterhaving gearing with,

the cutter-slide h pivoted upon the table a and adjustable angularly, the cutter-head t movable upon the slide and carrying the cutterspindlej, the feed-screw 70 with gearing at the outerend of the cutter-slide to reciprocate the cutter-head, the horizontal bearings g and d attached to the table, with the driving-shaft e supported in the bearing 9, and the shaftl supported in the bearing (1 and connected with the shaft e, and having the universal joint Z connected with the feed-screw gearing, the bearings g and connected with the bearing g, and the shaft tmounted in the bearing g and connected with the shaft 6, the whole arranged and operated substantially as herein set forth.

7. A gear-cutter, having the bed aand column b with means to support and rotate the blank, the table 0 adjustable upon the bed, the hinge-plate d with joint e upon the table, the segments f with gearing to elevate the hinge-plate, the bearing 7 secured to the table in line with the joint 6 for carrying the driving-shaft, the cutter-slide and cutterhead supported upon the hinge-plate, and separate trains of gearing connecting the drivingshaft 6' respectively with the change-wheels to control the shifting of the blank, and with the cutter, substantially as herein set forth.

8. A gear-cutter having the bed a with table 0 adjustable thereon, and provided with joint 6 and bearing 9 carrying the drivingshaft 6' in line with the joint e, the hingeplate (I having the cutter-slide h adjustably pivoted thereon, the cutter-headt' carrying cutter-spindlej, the feed-screw k with gearing at its forward end to reciprocate the cutter-head, and the shaft Z having the bearing (Z upon the hinge-plate, and the bearing it upon the cutter-slide and provided with the universal joints as set forth, connections between the shaft Z and the feed-screw gearing, and gearing connecting the same shaft with the cutter-spindle j, whereby the cutter-slide may be adjusted laterally and the hinge-plate adjusted vertically and the moving parts driven by connection with the shaft 6.

9. A gear-cutter adapted for cutting wormgcars and bevel-gears as set forth, and having the bed a, the adjustable table 0, the hinge-plate d, the cutter-slide 7t and the cutter-head t carrying the spindle j, the bearing g fixed upon the table and carrying the driving-shaft e in line with the joint of the hingeplate, a train of gearing connecting the driving-shaft with the cutter-spindle, and changewheels, as m, interposed in such train to vary the speed of the cutter-spindle, as and for the purpose set forth.

10. A gear-cutter having a worm-wheel, a worm and change-wheels to control the shifting of the blank, and provided with the bed a, the adjustable table 0, the hinge-plate (Z jointed to the table, the cutter-slide 7L and the cutter-head 1; carrying the spindlej, the bearing g fixed upon the table and carrying the driving-shaft e in line with the joint of the hinge-plate, a train of gearing connecting the said driving-shaft with the worm, and changewheels interposed between the driving-shaft and worm, to vary the speed of the worm in shifting the blank.

11. A gear-cutter having the bed a, and column b with mandrelbearing supporting worm-Wheel and Worm n as set forth, the table 0 adjustable upon the bed, the hinge-plate d with joint c upon the table and the cutterhead and slide supported upon the hingeplate as set forth, the bearing g secured to the table in line with the joint e for carrying the driving-shaft e, and a train of gearing connecting the driving-shaft with the worm and including the horizontal shaft 1. adapted to slip through one of the driving-wheels to compensate for the various adjustments of the table 0 upon the bed.

12. A gear-cutter having a horizontal bed supporting a cutter-slide with a cutter-head movable upon the same and'feed-gearing for reciprocating the head, the gear-case 7c upon the forward end of the slide containing the feed-gearin g, a driving-shaft with connection to such gearing, the bevel-gears s mounted upon the cutter-head and connected with the cutter, and the shaft m connected with the feed-gearing and extended through one of the bevel-gears s, to drive the cutter in the various positions of the cutter-head, substantially as herein set forth.

13. A gear-cutter having a worm-wheel, a worm and change-wheels to control the shifting of the blank, and provided with the bed a, the adjustable table a, the hinge-plate (Z jointed upon the table, the cutter-slide and cutter-head supported upon the hinge-plate, the bearing g fixed upon the table and carrying the driving-shaft e in line with the joint of the hinge-plate, and a train of gearing connecting the said driving-shaft with the worm, such train embracing the bevel-gears a and the splined shaft t extended through one of the said gears to rotate the worm in the different adjusted positions of the table 0, substantiall y as herein set forth.

14. A gear-cutter having the bed a and column b, the mandrel-bearing adjustable thereon, and having an arm projected parallel with the bearing and a bracket adjustable upon the arm to support the end of the mandrel, the hinge-plate d with cutter-slide and cutter-head supported thereon, gearing to elevate the hinge-plate and an adjustable connection between the cutter-slide and the arm to hold the cutter firmly in relation to the blank.

15. A gear-cutter having the bed a and column 'b, the inandrel-bearing adjustable upon the column and provided with auxiliary bearing a with arm u held adj ustably therein, and the bracket ad justablo upon the arm to support the mandrel, the hinge-plate with our hands in the presence of two subscribing cutter-slide and cutter-head supported therewitnesses. on 'earin to elevate the hin e-plate and the ifivot-i ink w connecting m3 outer ends 5 of the cutter-slide and the arm adjustably, t0

hold the cutter firmly up to the blank When Vitnesses:

the cutter-slide is inclined. THOMAS S. CRANE, In testimony whereof We have hereunto set J 03. B. PIERSON. 

